Date: Sat, 23 Jun 2001 08:03:51 +0300 From: Valentin Nechayev <netch@iv.nn.kiev.ua> To: Len Conrad <LConrad@Go2France.com> Cc: freebsd-hackers@FreeBSD.ORG Subject: Re: 2nd ata drive, and resolv.conf options Message-ID: <20010623080351.A982@iv.nn.kiev.ua> In-Reply-To: <5.1.0.14.0.20010622153827.02fa0da0@mail.Go2France.com>; from LConrad@Go2France.com on Fri, Jun 22, 2001 at 03:43:21PM %2B0200 References: <5.1.0.14.0.20010622153827.02fa0da0@mail.Go2France.com>
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Fri, Jun 22, 2001 at 15:43:21, LConrad (Len Conrad) wrote about "2nd ata drive, and resolv.conf options": > I'm setting up a couple of outbound, high-volume mail gateways that need > some kind fairly quick failover when their primary DNS is down, to use > another DNS. The behavior available in some resolvers seems sufficient. > > I've seen resolv.conf options of such as attempts:4 and timeout:2 in the > DNS & BIND book, etc but these are not in the 4.6R man resolv.conf page. RTFS ;)) > Is there any other way in FreeBSD to set these resolver params? You may use MTA config. E.g. sendmail does control these options with config: # name resolver options #O Timeout.resolver.retrans=5s #O Timeout.resolver.retrans.first=5s #O Timeout.resolver.retrans.normal=5s #O Timeout.resolver.retry=4 #O Timeout.resolver.retry.first=4 #O Timeout.resolver.retry.normal=4 If you use another MTA, you can port sendmail's way to implement these options: it changes internal resolver data. But I suppose better way is to pay much attention to choose and setup named. I maintain two mail emitters with moderately high volume of mail; with named 8.2.* default for FreeBSD, I need to restart named twice a day via cron task, otherwise it hangs in a few days. With >10 requests per second which require recursive search, named 8.2.3-release hangs up on my systems in a hour or two (it stops to serve requests, doesn't crash). Named 9.1.1 serves 20-30 such complicated requests per second without any problems. System is 4.3-release. /netch To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-hackers" in the body of the message
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